Portland Design WorksThe Ninja Pump & CO2 Inflator

This is well-made and looks good. As a CO2 pump, this works very well. As an emergency pump, it's okay, but it's too small to be anything other than a 'get you home' pump. The bracket holds the pump very securely. One downside is that the openings for the CO2 cartridge and valve aren't covered, so they're liable to getting water and muck in them.

I have used co2 inflators in the past, but always carried a hand pump just in case i needed a back up. I thought this combo pump/inflator was an elegant solution.At first i only used the hand pump and the performance did not blow me away or anything. It's a lot of effort to get up to a decent psi, but this is for emergencies and for that it would do the job. The trouble started when i ran over a construction staple on my way to work and opted to use the co2 inflator for the first time. I could not get the valve to open no matter how hard i tried, had to pump by hand and was late for work. Even when i got home i still could not open the valve, not even with vice grips which pretty much mangled the nob anyways. Unfortunately this all happened on the last eligible day for a return and i don't have a way to print the return label and mail it out by tomorrow. I wouldn't recommend this pump and as this is my first pdw product, i will probably steer clear in the future.

Easy to control a CO2 cartridge release and great for that purpose. As a pump, it took near 400 strokes to limp home on a 25mm at 90psi so treat it as your CO2 emergency backup. Small enough to fit in a seat bag or in a jersey pocket. Like most PDW stuff, it's nicely made. Be aware the presta adapter extends with a reverse thread.

Chef Alton Brown is famously known for his dislike of single-function kitchen devices. The same guidance applies to our biking rescue kits! While a multipurpose device often comes with limitations vs. its single use cousins, the space and weight savings on our steeds is a welcome compromise. This pump is lightweight, compact and eliminates the need for a separate CO2 valve as it’s built right into the pump. Some valves do not come with an on/off function- so as soon as the CO2 cartridge is punctured it empties itself. Not so with this little guy. If you have CO2 left, you can close it off and thrown the pump in your pocket in case you need a little boost down the trail. NOTE: obviously it’s more bulky if you do that and when you remove the cartridge it will release all its air.

I tested the CO2 cart and it worked great. I will carry 2 carts. I would not want to pump 80 psi by hand. Storage under my water bottle cage works well. Could not store it under the holder for my FoldyLock.

Some critics here ding this mini-pump for how many strokes it takes to inflate your tire. Well of course, that's the drawback to a MINI pump! I use this primarily as a CO2 inflator. The hand-pump I find useful mostly for partially inflating my punctured tube to find where the leak is, and for testing my patching job to ensure it's leakproof. But to really inflate the tire once it's mounted back on the wheel, that's where the CO2 cartridge is necessary. I would highly recommend planning to use it in this manner, not as a pure hand-pump inflator.Note I use Schrader valves, not Presta. I have had no trouble using this with Schrader valves, and cannot comment on the criticisms here of using this pump with with Presta. But if you also use Schrader valves with it, I doubt you will have issues.Meanwhie, it's a tiny pump, and the included mount tucks it behind and to the side of a water bottle cage where it's barely noticeable, but easily accessible when you need it.I do wish they included a CO2 cartridge sleeve to insulate your fingers from a freezing-cold CO2 cartridge. Most CO2 inflators come with one, and I know PDW makes a nice leather one, so it seems an inexcusible oversight not to include one with this device.I have not experienced the valve lock-up some have described using this as a CO2 inflator. It might be related to the cartridge brand. I exclusively use Pro Bike Tools' 25g cartridges with this and have had no difficulty after about a dozen uses between two of these pumps on two bikes.